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    Two-photon polymerization (2PP) enables high-resolution 3D microfabrication using biocompatible materials. This technique is ideal for creating complex scaffolds for tissue engineering without support structures.

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    Area of Science:

    • Biomaterials Engineering
    • Nanotechnology
    • Biomedical Engineering

    Background:

    • Two-photon polymerization (2PP) is a laser-based additive manufacturing technique.
    • It utilizes non-linear absorption of femtosecond laser pulses to cure photosensitive resins.
    • 2PP allows for high-resolution 3D microfabrication, with feature sizes ranging from micrometers down to nanometers.

    Purpose of the Study:

    • To highlight the capabilities of 2PP for biomedical applications.
    • To discuss the suitability of 2PP for fabricating complex 3D structures.
    • To emphasize the potential of 2PP in tissue engineering scaffold fabrication.

    Main Methods:

    • Utilizing femtosecond laser pulses for two-photon polymerization.
    • Employing biocompatible polymeric materials like PEG, PLA, PCL, and gelatin.
    • Fabricating complex 3D microstructures without support materials.

    Main Results:

    • Achieved high resolution from tens of micrometers down to hundreds of nanometers.
    • Successfully fabricated complex 3D structures, including those with overhangs.
    • Demonstrated suitability with various biocompatible materials.

    Conclusions:

    • 2PP is a versatile technique for creating intricate 3D microstructures.
    • The ability to fabricate complex geometries without supports makes it ideal for tissue engineering scaffolds.
    • The process is adaptable, does not require cleanroom conditions, and uses safe materials.